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US 6,807,198 B1Granted
Laser device
AssigneeFemtolasers Produktions GmbH
InventorsAlexander Fürbach, Ferenc Krausz
Life of this patent
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Abstract
A Laser arrangement (1) comprising a pump unit (2) containing a pumped laser crystal (3), and means, such as a saturable absorber (15), for passive mode-locking, wherein two separate, alternatively switchable resonator arms (11, 12) are provided, one resonator arm (11) of which, which is active in a pulse forming phase (21), comprises the saturable absorber (15), whereas the other resonator arm (12), which is active in an amplifying phase (22), is free from components that introduce losses.
Claims12
A laser arrangement to produce a plurality of amplified laser pulses, comprising:
- a common arm including a pump unit having a pumped laser crystal, the pump unit being configured to generate a plurality of laser pulses;
- a first resonator arm including a passive mode-locking arrangement configured to passively mode-lock phases of the laser pulses;
- a second resonator arm active in an amplifying phase and being free of components that introduce loses;
- and
- a switching arrangement arranged and operative to selectively connect the common arm to one of the resonator arms, and controllable to optically switch the laser pulses between the common arm and one of the resonator arms,
- wherein, during a pulse forming phase, the switching arrangement is controlled to switch the laser pulses between the common arm and the first resonator arm to mode-lock the phases of the laser pulses, and during an amplifying stage, the switching arrangement is controlled to switch the laser pulses between the common arm and the arm to amplify the mode-locked laser pulses to produce the amplified laser pulses.
3 more elements
Dependencies are inferred from the claim text.